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| 51 | <h1>Source code for sas.dataloader.readers.tiff_reader</h1><div class="highlight"><pre> |
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| 52 | <span class="c">#####################################################################</span> |
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| 53 | <span class="c">#This software was developed by the University of Tennessee as part of the</span> |
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| 54 | <span class="c">#Distributed Data Analysis of Neutron Scattering Experiments (DANSE)</span> |
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| 55 | <span class="c">#project funded by the US National Science Foundation. </span> |
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| 56 | <span class="c">#See the license text in license.txt</span> |
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| 57 | <span class="c">#copyright 2008, University of Tennessee</span> |
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| 58 | <span class="c">######################################################################</span> |
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| 59 | <span class="sd">"""</span> |
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| 60 | <span class="sd"> Image reader. Untested.</span> |
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| 61 | <span class="sd">"""</span> |
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| 62 | <span class="c">#TODO: load and check data and orientation of the image (needs rendering)</span> |
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| 63 | <span class="kn">import</span> <span class="nn">math</span> |
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| 64 | <span class="kn">import</span> <span class="nn">logging</span> |
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| 65 | <span class="kn">import</span> <span class="nn">os</span> |
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| 66 | <span class="kn">import</span> <span class="nn">numpy</span> |
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| 67 | <span class="kn">from</span> <span class="nn">sas.dataloader.data_info</span> <span class="kn">import</span> <span class="n">Data2D</span> |
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| 68 | <span class="kn">from</span> <span class="nn">sas.dataloader.manipulations</span> <span class="kn">import</span> <span class="n">reader2D_converter</span> |
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| 69 | |
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| 70 | <div class="viewcode-block" id="Reader"><a class="viewcode-back" href="../../../../dev/api/sas.dataloader.readers.html#sas.dataloader.readers.tiff_reader.Reader">[docs]</a><span class="k">class</span> <span class="nc">Reader</span><span class="p">:</span> |
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| 71 | <span class="sd">"""</span> |
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| 72 | <span class="sd"> Example data manipulation</span> |
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| 73 | <span class="sd"> """</span> |
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| 74 | <span class="c">## File type</span> |
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| 75 | <span class="n">type_name</span> <span class="o">=</span> <span class="s">"TIF"</span> |
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| 76 | <span class="c">## Wildcards</span> |
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| 77 | <span class="nb">type</span> <span class="o">=</span> <span class="p">[</span><span class="s">"TIF files (*.tif)|*.tif"</span><span class="p">,</span> |
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| 78 | <span class="s">"TIFF files (*.tiff)|*.tiff"</span><span class="p">,</span> |
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| 79 | <span class="p">]</span> |
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| 80 | <span class="c">## Extension</span> |
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| 81 | <span class="n">ext</span> <span class="o">=</span> <span class="p">[</span><span class="s">'.tif'</span><span class="p">,</span> <span class="s">'.tiff'</span><span class="p">]</span> |
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| 82 | |
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| 83 | <div class="viewcode-block" id="Reader.read"><a class="viewcode-back" href="../../../../dev/api/sas.dataloader.readers.html#sas.dataloader.readers.tiff_reader.Reader.read">[docs]</a> <span class="k">def</span> <span class="nf">read</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">filename</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span> |
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| 84 | <span class="sd">"""</span> |
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| 85 | <span class="sd"> Open and read the data in a file</span> |
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| 86 | <span class="sd"> </span> |
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| 87 | <span class="sd"> :param file: path of the file</span> |
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| 88 | <span class="sd"> """</span> |
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| 89 | <span class="k">try</span><span class="p">:</span> |
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| 90 | <span class="kn">import</span> <span class="nn">Image</span> |
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| 91 | <span class="kn">import</span> <span class="nn">TiffImagePlugin</span> |
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| 92 | <span class="n">Image</span><span class="o">.</span><span class="n">_initialized</span><span class="o">=</span><span class="mi">2</span> |
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| 93 | <span class="k">except</span><span class="p">:</span> |
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| 94 | <span class="n">msg</span> <span class="o">=</span> <span class="s">"tiff_reader: could not load file. Missing Image module."</span> |
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| 95 | <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">,</span> <span class="n">msg</span> |
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| 96 | |
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| 97 | <span class="c"># Instantiate data object</span> |
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| 98 | <span class="n">output</span> <span class="o">=</span> <span class="n">Data2D</span><span class="p">()</span> |
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| 99 | <span class="n">output</span><span class="o">.</span><span class="n">filename</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">basename</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span> |
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| 100 | |
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| 101 | <span class="c"># Read in the image</span> |
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| 102 | <span class="k">try</span><span class="p">:</span> |
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| 103 | <span class="n">im</span> <span class="o">=</span> <span class="n">Image</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span> |
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| 104 | <span class="k">except</span><span class="p">:</span> |
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| 105 | <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">,</span> <span class="s">"cannot open </span><span class="si">%s</span><span class="s">"</span><span class="o">%</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span> |
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| 106 | <span class="n">data</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">getdata</span><span class="p">()</span> |
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| 107 | |
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| 108 | <span class="c"># Initiazed the output data object</span> |
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| 109 | <span class="n">output</span><span class="o">.</span><span class="n">data</span> <span class="o">=</span> <span class="n">numpy</span><span class="o">.</span><span class="n">zeros</span><span class="p">([</span><span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">1</span><span class="p">]])</span> |
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| 110 | <span class="n">output</span><span class="o">.</span><span class="n">err_data</span> <span class="o">=</span> <span class="n">numpy</span><span class="o">.</span><span class="n">zeros</span><span class="p">([</span><span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">1</span><span class="p">]])</span> |
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| 111 | <span class="n">output</span><span class="o">.</span><span class="n">mask</span> <span class="o">=</span> <span class="n">numpy</span><span class="o">.</span><span class="n">ones</span><span class="p">([</span><span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">1</span><span class="p">]],</span> <span class="n">dtype</span><span class="o">=</span><span class="nb">bool</span><span class="p">)</span> |
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| 112 | |
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| 113 | <span class="c"># Initialize</span> |
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| 114 | <span class="n">x_vals</span> <span class="o">=</span> <span class="p">[]</span> |
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| 115 | <span class="n">y_vals</span> <span class="o">=</span> <span class="p">[]</span> |
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| 116 | |
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| 117 | <span class="c"># x and y vectors</span> |
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| 118 | <span class="k">for</span> <span class="n">i_x</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">0</span><span class="p">]):</span> |
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| 119 | <span class="n">x_vals</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">i_x</span><span class="p">)</span> |
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| 120 | |
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| 121 | <span class="n">itot</span> <span class="o">=</span> <span class="mi">0</span> |
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| 122 | <span class="k">for</span> <span class="n">i_y</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">1</span><span class="p">]):</span> |
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| 123 | <span class="n">y_vals</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">i_y</span><span class="p">)</span> |
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| 124 | |
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| 125 | <span class="k">for</span> <span class="n">val</span> <span class="ow">in</span> <span class="n">data</span><span class="p">:</span> |
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| 126 | <span class="k">try</span><span class="p">:</span> |
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| 127 | <span class="n">value</span> <span class="o">=</span> <span class="nb">float</span><span class="p">(</span><span class="n">val</span><span class="p">)</span> |
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| 128 | <span class="k">except</span><span class="p">:</span> |
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| 129 | <span class="n">logging</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s">"tiff_reader: had to skip a non-float point"</span><span class="p">)</span> |
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| 130 | <span class="k">continue</span> |
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| 131 | |
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| 132 | <span class="c"># Get bin number</span> |
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| 133 | <span class="k">if</span> <span class="n">math</span><span class="o">.</span><span class="n">fmod</span><span class="p">(</span><span class="n">itot</span><span class="p">,</span> <span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span> |
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| 134 | <span class="n">i_x</span> <span class="o">=</span> <span class="mi">0</span> |
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| 135 | <span class="n">i_y</span> <span class="o">+=</span> <span class="mi">1</span> |
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| 136 | <span class="k">else</span><span class="p">:</span> |
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| 137 | <span class="n">i_x</span> <span class="o">+=</span> <span class="mi">1</span> |
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| 138 | |
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| 139 | <span class="n">output</span><span class="o">.</span><span class="n">data</span><span class="p">[</span><span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="o">-</span> <span class="mi">1</span> <span class="o">-</span> <span class="n">i_y</span><span class="p">][</span><span class="n">i_x</span><span class="p">]</span> <span class="o">=</span> <span class="n">value</span> |
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| 140 | |
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| 141 | <span class="n">itot</span> <span class="o">+=</span> <span class="mi">1</span> |
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| 142 | |
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| 143 | <span class="n">output</span><span class="o">.</span><span class="n">xbins</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> |
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| 144 | <span class="n">output</span><span class="o">.</span><span class="n">ybins</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> |
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| 145 | <span class="n">output</span><span class="o">.</span><span class="n">x_bins</span> <span class="o">=</span> <span class="n">x_vals</span> |
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| 146 | <span class="n">output</span><span class="o">.</span><span class="n">y_bins</span> <span class="o">=</span> <span class="n">y_vals</span> |
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| 147 | <span class="n">output</span><span class="o">.</span><span class="n">qx_data</span> <span class="o">=</span> <span class="n">numpy</span><span class="o">.</span><span class="n">array</span><span class="p">(</span><span class="n">x_vals</span><span class="p">)</span> |
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| 148 | <span class="n">output</span><span class="o">.</span><span class="n">qy_data</span> <span class="o">=</span> <span class="n">numpy</span><span class="o">.</span><span class="n">array</span><span class="p">(</span><span class="n">y_vals</span><span class="p">)</span> |
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| 149 | <span class="n">output</span><span class="o">.</span><span class="n">xmin</span> <span class="o">=</span> <span class="mi">0</span> |
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| 150 | <span class="n">output</span><span class="o">.</span><span class="n">xmax</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">-</span> <span class="mi">1</span> |
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| 151 | <span class="n">output</span><span class="o">.</span><span class="n">ymin</span> <span class="o">=</span> <span class="mi">0</span> |
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| 152 | <span class="n">output</span><span class="o">.</span><span class="n">ymax</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">-</span> <span class="mi">1</span> |
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| 153 | |
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| 154 | <span class="c"># Store loading process information</span> |
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| 155 | <span class="n">output</span><span class="o">.</span><span class="n">meta_data</span><span class="p">[</span><span class="s">'loader'</span><span class="p">]</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">type_name</span> |
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| 156 | <span class="n">output</span> <span class="o">=</span> <span class="n">reader2D_converter</span><span class="p">(</span><span class="n">output</span><span class="p">)</span> |
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| 157 | <span class="k">return</span> <span class="n">output</span></div></div> |
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